Common Ion Effect (HSC SSCE Chemistry): Flashcards

Adding common ion decreases solubility of sparingly soluble salt

Ion shared between two substances in solution

Decreases the solubility of the salt

Le Chatelier's principle - equilibrium shifts to reduce added ion

Backwards (left), favouring reverse reaction

Product of ion concentrations raised to stoichiometric powers

If $s \ll c$, then $(c + s) \approx c$

More solid precipitates out of solution

$Q_{sp} > K_{sp}$

27 million times less soluble in KI